The hero linked to the quest for immortality in various tales is often Gilgamesh, from ancient Mesopotamian mythology. In the Epic of Gilgamesh, he embarks on a journey to discover the secret of eternal life after the death of his friend Enkidu. His quest explores profound themes of friendship, human mortality, and the search for legacy. Ultimately, Gilgamesh learns that immortality is not in eternal life, but rather in the lasting impact one leaves behind through deeds and relationships, emphasizing the human condition.